find_anagrams.py

#!/usr/bin/env python3

import unittest
from collections import Counter


def find_anagrams(list_of_strings, word):
    return [c for c in list_of_strings
            if Counter(c.lower()) == Counter(word.lower())
            if c.lower() != word.lower()]


class AnagramsTestCase(unittest.TestCase):
    def test_example(self):
        self.assertEqual(
            find_anagrams(["spare", "hello", "pears", "world", "reaps"],
                          "parse"),
            ["spare", "pears", "reaps"]
        )

    def test_case_insensitive(self):
        self.assertEqual(
            find_anagrams(["Spare", "hello", "pears", "world", "reaps"],
                          "parse"),
            ["Spare", "pears", "reaps"]
        )

    def test_same_word_isnt_anagram(self):
        self.assertEqual(
            find_anagrams(['strawberry'], 'strawberry'),
            []
        )

        self.assertEqual(
            find_anagrams(['ok', 'Ok', 'OK'], 'ok'),
            []
        )


if __name__ == '__main__':
    unittest.main()